A student has to test whether a laboratory sample contains a strong base. Which is the most suitable procedure to confirm it?

Subject: General Awareness | Topic: Science | Difficulty: MEDIUM

Options

1. (A) Adding methyl orange and looking for a red colour
2. (B) Dipping blue litmus paper and checking whether it stays blue
3. (C) Adding a drop of phenolphthalein and observing a pink colour
4. (D) Smelling the solution for a strong odour

Verified Answer

Option (C): Adding a drop of phenolphthalein and observing a pink colour

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